Stove



J. S. CLARK.

Cook Stove.

Patented Dec. 14, 1858.

UNITED STATES PATENT OFFICE.

JOHN S. CLARK, OF PHILADELPHIA, PENNSYLVANIA.

. STOVE.

Specification of Letters Patent No. 22,276, dated December 14, 1858.

T 0 all whom it may concern:

Be it known that I, JOHN S. CLARK, of the city of Philadelphia, in the State of Pennsylvania, have invented a new and useful Improvement in Cook- Stoves; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters and marks thereon.

My improvement has for its object the more perfect consumption of the gaseous products of combustion near the source of their being given out than is effected by cook stoves now in use; and it consists in placing a movable plate with perforations at the top thereof, behind the fuel in the grate and between it and the usual plate of the stove; and so arranging said movable plate in relation to passages of air through the side plate of the stove, that'a chamber is formed for the admission of and heating up of the air and for distributing the heated air among the products of combustion as they pass from the fuel over and around the oven.

My improvement is more specially designed for the burning of coal, though it may be used with any kind of fuel.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation.

Of the drawings forming part of this specification Figure 1, is a perspective view of a cook stove, the covers of the pot holes being removed so as to show the holes in the movable plate, and the air passages in the side plate of the stove being also shown. Fig. 2 is a longitudinal sectional view.

In both of these figures indicates the top of the stove, (I), b) the front doors, the grate, (cl) the movable plate, (6, e) the holes in the same, the usual back plate of the fire-box or furnace, (g) the oven, (h) the door to the ash-pit and (i, i) the air passages in the side plates of the stove. These passages are shown as being without doors or covers, but doors or sliding covers can be used so as to regulate the area of the passages and thus graduate the quantity of air admitted. The plate (d) as is shown by the drawings has its lower edge resting upon a shoulder of the plate that supports the rear end of the grate, and its upper edge resting against and upon the edges of the top and front plates of the oven. There is thus formed an air chamber between the movable plate and the usual back plate into which air comes through the passages (2 2,) is heated and expanded and distributed through the holes (6, 0) into and among the gaseous products of combustion as they are passing backward over and around the oven. The free admission of the heated air at this point is found greatly to economize the use of fuel and to give rapid heating up to the oven. The plate (d), it will be noticed, is movable. This allows of its being readily detached and taken out in case of being broken, and, also, of its adjustment, so that a greater opening may be made for the escape of the heated air, if desirable, by having the upper edge of this plate a distance from the supporting edges of the other plates. It further allows of the forward deflection of the plate over the fuel and the contraction of the upper fuel space and of the regulating to some extent of the draft thereby.

Having thus fully set out the construction and operation of my invention, what I claim as new and desire to secure by Letters Patent is,

The movable plate (cl) as it is arranged with and has relation to the grate, the usual back plate (1)), the air passages (2', i), and the passage for the products of combustion, as set forth.

This specification signed this 23d day of October 1858.

JOHN S. CLARK.

Witnesses:

J. Vet. THOMPSON, J AMES ROBINSON. 

